}

    @Override
    protected Object getExtensionKey(Extension extension) {
        return extension.getGroupId() + ':' + extension.getArtifactId();
    }

    @Override
    protected Object getExclusionKey(Exclusion exclusion) {
        return exclusion.getGroupId() + ':' + exclusion.getArtifactId();
    }

    protected String extrapolateChildUrl(String parentUrl, boolean appendPath, Map<Object, Object> context) {

        return resource;
    }

    protected Object getExtensionKey(Extension extension) {
        return extension;
    }

    protected Object getExclusionKey(Exclusion exclusion) {
        return exclusion;
    }

    /**
     * Use to compute keys for data structures
     * @param <T>
     */
    private interface KeyComputer<T> {